Greg Pomerantz
3c5bee96ce
Some dump files carry a trailing 'ctime' column: an older pipeline appended a FULL re-download of the symbol per download (up to ~28 vintages per date, 2019-2022). The consumer keeps the last row per date, so it silently used stale (~2021) vintages where Yahoo later revised values. scripts/clean_multivintage.py keeps, per date, the rows from the newest ctime (event files keep distinct same-day amounts; history/split keep the single newest row), drops the ctime column, sorts by date. Applied to the data root and overrides/frozen (which carried the same artifact): 1,065 files, 2,202,712 stale rows dropped. Also: stripped 3 UTF-8 BOMs (teg/lo/krft), refreshed the event backup with the cleaned files, and re-ran the double-listing scan: category C (83 symbols, 18,636 repeated within-file rows) is fully explained by the multi-vintage artifact and is now gone; A (6,589 pairs, corrected) and B (12,366 pairs, open review list) are unchanged. Whole-set structural QC after cleaning: 0 duplicate dates, 3 syms/15 rows of OHLC invariant violations, 15 syms/2,897 rows of non-positive prices (mostly long-delisted tickers), 8 unsorted files (reader sorts).
65 lines
1009 B
Plaintext
65 lines
1009 B
Plaintext
Date,Dividends
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2005-12-13,0.4
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2006-03-13,0.4
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2006-06-13,0.4
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2006-09-13,0.4
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2006-12-13,0.4
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2007-03-13,0.4
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2007-06-13,0.4
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2007-09-12,0.4
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2007-12-12,0.4
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2008-03-12,0.4
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2008-06-11,0.4
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2008-09-11,0.4
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2008-12-11,0.4
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2009-03-11,0.4
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2009-06-11,0.24
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2009-09-11,0.24
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2009-12-11,0.24
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2010-03-11,0.24
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2010-06-11,0.24
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2010-09-13,0.24
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2010-12-13,0.24
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2011-03-11,0.24
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2011-06-13,0.24
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2011-09-13,0.24
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2011-12-13,0.24
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2012-03-13,0.24
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2012-06-13,0.24
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2012-09-12,0.24
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2012-12-12,0.24
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2013-03-19,0.24
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2013-06-12,0.24
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2013-09-11,0.24
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2013-12-11,0.24
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2014-03-12,0.24
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2014-06-11,0.24
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2014-09-11,0.24
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2014-12-11,0.24
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2015-03-11,0.24
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2015-06-11,0.24
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2015-09-11,0.24
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2015-12-11,0.24
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2016-03-11,0.24
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2016-06-13,0.24
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2016-09-13,0.24
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2016-12-13,0.24
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2017-03-13,0.24
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2017-06-13,0.24
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2017-09-14,0.24
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2017-12-14,0.24
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2018-03-14,0.24
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2018-06-14,0.24
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2018-09-13,0.24
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2018-12-13,0.24
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2019-03-14,0.24
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2019-06-13,0.24
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2019-09-12,0.24
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2019-12-12,0.24
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2020-03-12,0.24
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2020-06-12,0.12
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2020-09-14,0.12
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2020-12-14,0.12
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2021-03-12,0.12
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2021-06-14,0.12
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